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Search: Posts Made By: dxzh
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Forum: Rumours & News
9th Feb 2010, 00:43
Replies: 3,239
Views: 1,137,470
Posted By dxzh

Report links

Try the following links:

http://www.aaib.gov.uk/cms_resources.cfm?file=/1-2010%20G-YMMM%20Synopsis.pdf
http://www.aaib.gov.uk/cms_resources.cfm?file=/1-2010%20G-YMMM%20Contents.pdf...
Forum: Rumours & News
13th Sep 2008, 02:37
Replies: 3,239
Views: 1,137,470
Posted By dxzh

infrequentflyer789 (#1978) - Agree about...

infrequentflyer789 (#1978)

- Agree about noise and switch-off of OJ pumps.

- I have been through posts but not seen centre tank scavenge inlets, OJ pump inlets or drain valves relative to each...
Forum: Rumours & News
12th Sep 2008, 23:28
Replies: 3,239
Views: 1,137,470
Posted By dxzh

AD

1. AD

AD pretty much as predicted last week.

As a stop gap measure to keep 777s flying (given regulatory imperative to avoid certain levels of risk for significant failure conditions...
Forum: Rumours & News
12th Sep 2008, 17:11
Replies: 3,239
Views: 1,137,470
Posted By dxzh

1. Main tank water scavenge If centre tank...

1. Main tank water scavenge

If centre tank fuel scavenge pipes can ice up, perhaps the main tank water scavenge ones could in certain conditions too? Maybe a scenario with cold-soaked fuel in...
Forum: Rumours & News
12th Sep 2008, 11:18
Replies: 3,239
Views: 1,137,470
Posted By dxzh

A few more thoughts related to centre tank pump...

A few more thoughts related to centre tank pump inlets:

- Each OJ pump must be able to pump, while in climb and then cruise, 99% (as in (80t- 0.8t)/80t) of the fuel out of the centre tank before...
Forum: Rumours & News
11th Sep 2008, 07:41
Replies: 3,239
Views: 1,137,470
Posted By dxzh

I would like to try and take a step back and...

I would like to try and take a step back and explore why current sumping procedures, even when correctly applied, might be inadequate and allow significant water (whether free or entrained/dissolved)...
Forum: Rumours & News
10th Sep 2008, 20:45
Replies: 3,239
Views: 1,137,470
Posted By dxzh

DC-ATE, entirely fair comment on your part and I...

DC-ATE, entirely fair comment on your part and I agree "We'll never now" - but I respect the crew nonetheless for what I do know which is that they got the plane down safely having been put into a...
Forum: Rumours & News
10th Sep 2008, 17:54
Replies: 3,239
Views: 1,137,470
Posted By dxzh

FullWings and others well explain the practical...

FullWings and others well explain the practical uncertainties associated with the hypothesised alternative ways of handling the aircraft after the double rollback - particularly given the...
Forum: Rumours & News
9th Sep 2008, 14:12
Replies: 3,239
Views: 1,137,470
Posted By dxzh

Rainboe, I am beware but no good at the fire and...

Rainboe, I am beware but no good at the fire and brimstone. As I was "engaged", I just wanted to respond in a hopefully constructive fashion. My view is simple:

- the crew did a great job,...
Forum: Rumours & News
9th Sep 2008, 13:04
Replies: 3,239
Views: 1,137,470
Posted By dxzh

The interim report states that the No.3 Jet Fuel...

The interim report states that the No.3 Jet Fuel uplifted was at +5C (see page 10 of interim report).

The centre tank was empty prior to the uplift, save for any ice which, especially if in...
Forum: Rumours & News
9th Sep 2008, 12:39
Replies: 3,239
Views: 1,137,470
Posted By dxzh

sispanys ria Thank you for your message. In...

sispanys ria

Thank you for your message. In response:

- I do not believe in Santa Claus.
- "many countries" do not have the expertise to analyse the raw data, hence they may release the...
Forum: Rumours & News
9th Sep 2008, 00:18
Replies: 3,239
Views: 1,137,470
Posted By dxzh

CONF iture, I am certainly now prepared to...

CONF iture,

I am certainly now prepared to give more credence to the "apparently leaked" FAA memo dated 24 January 2008 (which popped up on the internet by 1 February 2008). This is because the...
Forum: Rumours & News
8th Sep 2008, 10:15
Replies: 3,239
Views: 1,137,470
Posted By dxzh

In summary, the holes in Swiss cheese...

In summary, the holes in Swiss cheese (contributory factors) seem to me currently to be that within certified flight envelope:

1. Operational environment

- Long cold-soak sector.
-...
Forum: Rumours & News
8th Sep 2008, 09:02
Replies: 3,239
Views: 1,137,470
Posted By dxzh

Here is some alternative speculation as to how a...

Here is some alternative speculation as to how a concentration of water in excess of 40ppm (ie in excess of water concentration found in main tanks) not derived from the main tanks might end up in...
Forum: Rumours & News
7th Sep 2008, 22:55
Replies: 3,239
Views: 1,137,470
Posted By dxzh

1. Possible interim safety measures suggested by...

1. Possible interim safety measures suggested by Boeing

I could not find it expressly referred to elsewhere in this thread but interim safety measures as reported last week to be 'in the...
Forum: Rumours & News
6th Sep 2008, 16:03
Replies: 3,239
Views: 1,137,470
Posted By dxzh

What a fascinating interim report - illuminating...

What a fascinating interim report - illuminating and in plain English. I would like to highlight a few points which might be good to see addressed (or dismissed) in more detail in due course:

1....
Forum: Rumours & News
10th Aug 2008, 18:15
Replies: 3,239
Views: 1,137,470
Posted By dxzh

"Icing" in valves theory

1. How much water would be needed to allow enough "icing" to develop in each of the relevant valves (mentioned by Top Bunk) sufficient to restrict them?

2. Is this really realistic given that...
Forum: Rumours & News
27th Jul 2008, 20:33
Replies: 3,239
Views: 1,137,470
Posted By dxzh

@Bis47, I guess your "fuel ice messages"...

@Bis47, I guess your "fuel ice messages" reference is to the unverified report on pilotsofamerica.com forum (see UPDATE on the LHR (Heathrow) 777 incident - Pilots of America Message Board...
Forum: Rumours & News
23rd Jul 2008, 20:51
Replies: 3,239
Views: 1,137,470
Posted By dxzh

lomopaseo

Thanks - point taken re ETOPS, rollback and fluke.

And I agree about living with knowns and unknowns for controlled periods - we all accept a measure of risk in living our daily lives.
Forum: Rumours & News
23rd Jul 2008, 18:21
Replies: 3,239
Views: 1,137,470
Posted By dxzh

@netstruggler/FullWings

I see what you mean about this potentially applying to any aircraft and I am conscious that statistics can be used any which way by whoever chooses the assumptions and data to be analysed. I had not...
Forum: Rumours & News
23rd Jul 2008, 08:09
Replies: 3,239
Views: 1,137,470
Posted By dxzh

Re-Heat #1544

I am sorry for not making myself clear. I am not currently suggesting that the plane be grounded - quite the reverse.

However, the recovery of the aircraft largely intact and 5 months of...
Forum: Rumours & News
22nd Jul 2008, 22:04
Replies: 3,239
Views: 1,137,470
Posted By dxzh

Flaw and hindsight

Two questions, the second of which is hopelessly naive but seems important to address if only to rule out:

1. Has anyone yet any confirmed example of any cavitation-induced damage to similar HP...
Forum: Rumours & News
17th May 2008, 18:39
Replies: 3,239
Views: 1,137,470
Posted By dxzh

Cavitation and water questions

A few questions related to cavitation and one on water content:

1. Have there been any other reports at all of cavitation damage in any HP pump used in 777 or any other similar Boeing 7 series...
Forum: Rumours & News
2nd Mar 2008, 13:03
Replies: 3,239
Views: 1,137,470
Posted By dxzh

Fuel - "excessive aeration"

Fuel "excessive aeration" theory might be explained, in part, by a significant difference in more recent Boeings (post TWA800). Recent Boeings use centre tank fuel scavenge jet pumps with motive...
Forum: Rumours & News
25th Feb 2008, 00:43
Replies: 3,239
Views: 1,137,470
Posted By dxzh

NSEU

Even if slush is only transferred into each main tank at rate of 200 kg per hour, then in 10 minutes that is 33 kg in each main tank.

If all, or even only part, of it freezes on contact with fuel...
Forum: Rumours & News
24th Feb 2008, 21:00
Replies: 3,239
Views: 1,137,470
Posted By dxzh

Given the mundane nature of the flight and...

Given the mundane nature of the flight and reliability of 777s, the set of circumstances leading to BA038 accident must be very rare.

My favourite, most unlikely alignment (of the Swiss cheeses)...
Showing results 1 to 26 of 26


 
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